body{
  width: 1900px;
  height: 960px;
  padding: 0;
  margin: 0;
  background-color: #efeff0;
  position: relative;
}
ul{
  margin: 0;
  padding: 0;
}
li{
  list-style-type: none;
}
.left{
  height: 93%;
  width: 220px;
  background-color: white;
  float: left;
}
.top .logo{
  width: 220px;
  height: 70px;
  background-color: #1e87f0;
  color: white;
  text-align: center;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-size: 18px;
  line-height: 70px;
  font-weight: 550;
}
.left>.logo>span{
  margin-right: 10px;
}
/* 菜单项 */
.mymenu>li{
  width: 90%;
  height: 55px;
  margin: 0 auto;
  text-align: center;
  line-height: 55px;
  border-bottom: 1px solid #d8d8d8;
  font-weight: 550;
  position: relative;
}
.mymenu>li:hover{
  cursor: pointer;
  background-color: #35acf6;
  color: white !important;
}
.mymenu>li img{
  position: absolute;
  right: 0;
  top: 20px;
}
.top{
  height: 70px;
  width: 100%;
  background-color: white;
  left: 220px;
  overflow: hidden;
}
.top>.message{
  position: absolute;
  top: 20px;
  left: 250px;
}
.top>.headimg{
  position: absolute;
  top: 10px;
  right: 180px;
}
.top>.logout{
  width: 100px;
  height: 40px;
  position: absolute;
  right: 50px;
  top: 15px;
  background-color: #35acf6;
  color: white;
  line-height: 40px;
  text-align: center;
  font-weight: 550;
  border-radius: 10px;
  box-shadow: 2px 2px 2px 2px rgba(0, 0, 0, .5);
}
.top>.logout:hover{
  cursor: pointer;
}
.main {
  float: left;
  margin: 35px 35px 0;
  width: 84%;
  height: 89%;
  background-color: white;
}
a{
  text-decoration: none;
  color: #000;
}
a:hover{
  color: #fff;
}
.active{
  background-color: #35acf6;
}